cPanel is the most popular Control Panel instrument on the hosting market. It's feature-rich and it features an easy-to-use interface that will give you full control over your sites. It is simple to take care of files, emails and databases, take a look at usage statistics, set up script-driven apps, and many others. The software is preferred by many hosting companies, because it also has a reseller counterpart called WebHost Manager (WHM). This software tool will provide you with a web-based graphical interface, through which you're able to handle a number of server-side settings, generate hosting plans or new client accounts and modify their features with only a couple of clicks. You can also set up different modules and applications, change DNS records, brand the cPanel accounts that your clients will get, add and remove features from their Control Panels, etcetera. cPanel and WHM are supported by almost all billing apps out there, so this is one of the best platforms in case you want to become a reseller.